Ethylene Glycol → Bis(2-hydroxyethyl) terephthalate

HRID 856869

반응식

HRID 856869 반응식
[C:1]([OH:12])(=[O:11])[C:2]1[CH:10]=[CH:9][C:5]([C:6]([OH:8])=[O:7])=[CH:4][CH:3]=1.[CH2:13]([OH:16])[CH2:14]O.C(N([CH2:22][CH3:23])CC)C.[OH2:24]>>[C:1]([O:12][CH2:14][CH2:13][OH:16])(=[O:11])[C:2]1[CH:10]=[CH:9][C:5]([C:6]([O:8][CH2:23][CH2:22][OH:24])=[O:7])=[CH:4][CH:3]=1

참가 물질

5

반응물 4

HCID 174Ethylene GlycolHCID 962WaterHCID 7489Terephthalic AcidHCID 8471Triethylamine

생성물 1

HCID 13739Bis(2-hydroxyethyl) terephthalate

실험 절차

A heat transfer medium-circulating 2-L stainless steel autoclave equipped with a stirrer was charged with high-purity terephthalic acid and ethylene glycol in the molar ratio of 1:2, and triethylamine was added in an amount of 0.3 mol-% relative to the acid component, and the mixture was subjected to esterification reaction for 120 minutes at a pressure of 0.25 MPa at 245° C. while water was distilled away from the system, whereby a mixture of bis(2-hydroxyethyl) terephthalate (BHET) and oligomers (referred to hereinafter as BHET mixture) was obtained. To this BHET mixture was added the above-described aluminum salt A in an amount of 0.02 mol-% in terms of aluminum atom relative to the acid component in the polyester, and the mixture was stirred at 245° C. for 10 minutes in a nitrogen atmosphere at normal pressure. Then, the temperature was increased to 275° C. over 50 minutes while the pressure in the reaction system was gradually reduced to 0.1 Torr, and the polymerization reaction was further conducted at 275° C. at 0.1 Torr. The polymerization time (AP) necessary for the IV of the polyethylene terephthalate to reach 0.65 dl/g is shown in Table 13.

후처리

  1. additionwas added in an amount of 0.3 mol-% relative to the acid component
  2. distillationwas distilled away from the system, whereby
  3. additiona mixture of bis(2-hydroxyethyl) terephthalate (BHET)

출처 및 근거

ORD 기록
ord-4fb7836ca2de4e0c9e1c086448fb2160
출처 데이터셋
uspto-grants-2006_12
특허 번호
US07144614B2

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